Many thanks for that 411A. Most of the DC-10-30s came out around 260T and with the CF-6 C2B option this went up to 263T. (I believe the military operate the KC10 at nearly 270T).
I can now see why an L10-200F at 215T would only go 5 hours 30 minutes with a full load. It is a big difference.
Loading through the pax doors (unless it is SLF) is going to be pretty interesting if that is indeed the plan!
By the way, I have seen a couple of Hewa Bora (Congo) L1011s recently floating around Europe and they look very smart.